Archive for the ‘Rhino’ Category

Rhino 4 NURBS Solid Modeling Tutorial – Model a Webcam Step-by-Step

Saturday, March 7th, 2009

This tutorial is based on toxiclab’s webcam tutorial. I tried to be a little more explicit as this is intended for beginners.

Colors in the screenshots are only intended to distinguish between steps. Enjoy!

webcam2

The final product should look something like this

Webcam file with all steps (.3dm, 16mb)

Step 1.a
Start a new file (small obj/inches)
Step 1.a
Step 1.b
In the Top viewport, draw 2 concentric circles, centered on 0, 1″ and 2″ diameters respectively.
Step 1.b
Step 2
Copy and paste the smaller circle in place.
Step 2
Step 3
Turn on Osnap and activate Cen only. Activate Move command, snap to Cen of copied small circle, then type <45 to add an angle constraint.
Step 3
Step 4
Move small circle outward so that it intersects with the outer circle.
Step 4
Step 5
Activate the ArrayPolar command. Select the small circle to array. Set 0 as the center of the array. Set the number of items to 4. Set the angle to 360. Hit Enter.
Step 5
Step 6.a
Select the four small circles. Activate the Split command, and split the large circle.
Step 6a
Step 6.b
Select the large circle, then activate the Split command and split the four smaller circles.
Step 6b
Step 7
Select the four larger segments of the outer circle, and the four smaller segments of the outer circles–they’ll form a rounded cross-shape. Join these curves with the Join command.
Step 7
Step 8
Turn on grid snapping. Select the innermost circle, and move it up one inch in the RIght or Front viewport by clicking and dragging.
Step 8
Step 8
Step 9
In the Front viewport, turn on grid Snap. Activate the Interpolate Points curve tool.
To draw the first point, snap to the grid intersection on the x axis that is two inches to the right of zero. Then turn Snap off. Draw a line that is the approximate shape shown – it does not have to match perfectly. To draw the last point, turn Snap back on, and snap to the grid intersection that is 1″ above the x-axis and 1″ to the right of the z-axis.
Step 9
Step 10
Select the curve you just drew, then activate the Offset command. Set the Distance to 0.04″, and offset below the original curve.
Step 9